CN103821080B - The Main Girder Deflection control device of simply supported girder bridge - Google Patents
The Main Girder Deflection control device of simply supported girder bridge Download PDFInfo
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- CN103821080B CN103821080B CN201410060861.9A CN201410060861A CN103821080B CN 103821080 B CN103821080 B CN 103821080B CN 201410060861 A CN201410060861 A CN 201410060861A CN 103821080 B CN103821080 B CN 103821080B
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Abstract
本发明提供一种简支梁桥的主梁挠度控制装置，包括与主梁平行设置的可压缩螺旋体，所述螺旋体的两端上部分别与支撑主梁的两个桥墩固定连接，下部为自由端；在主梁的跨中位置竖向设置有钢杆，所述钢杆连接在主梁和螺旋体之间；在两个桥墩的前后两侧分别固定有滑轮，所述钢杆上固定有绳索，所述绳索的另一端分别跨过滑轮后交叉固定在螺旋体的下部。本发明提供的简支梁桥的主梁挠度控制装置，结构简单、能有效地控制主梁挠度，而且在极端情况下能提供支撑和耗能作用，从而大大提升了主梁的安全系数，减少生命财产损失。
The invention provides a main girder deflection control device of a simply supported girder bridge, comprising a compressible helix arranged parallel to the main girder, the upper parts of the two ends of the helical body are respectively fixedly connected with two piers supporting the main girder, and the lower part is a free end A steel rod is vertically arranged at the mid-span position of the main girder, and the steel rod is connected between the main girder and the spiral body; pulleys are respectively fixed on the front and rear sides of the two piers, and a rope is fixed on the steel rod, The other ends of the ropes are crossed and fixed on the lower part of the spiral body after crossing the pulleys respectively. The main girder deflection control device of a simply supported girder bridge provided by the present invention has a simple structure, can effectively control the main girder deflection, and can provide support and energy dissipation in extreme cases, thereby greatly improving the safety factor of the main girder and reducing Loss of life and property.
Description
技术领域technical field
本发明涉及的桥梁领域的一种控制装置，特别是一种简支梁桥的主梁挠度控制装置。The invention relates to a control device in the field of bridges, in particular to a main girder deflection control device of a simply supported girder bridge.
背景技术Background technique
简支梁桥在基础建设中获得了非常广泛的应用，也是事故的多发群体。为了确保简支梁桥的安全运行，需要对主梁的挠度情况进行监测和控制，因为主梁一旦出现过大的挠度，会影响到桥面的正常通行，而且引起线型的改变，进而改变内力分布情况，造成结构破坏。现有技术大多集中于对主梁挠度的监测方面，如基于无线倾角的桥梁结构挠度测量系统，用无线倾角传感器和相应的数据处理单元来获取挠度值。但仅仅进行挠度监测是不够的，需要对主梁过大挠度进行及时有效地干预和控制才能真正确保桥梁安全，因此有必要继续开发针对简支梁桥的主梁挠度控制装置。Simply supported girder bridges have been widely used in infrastructure construction, and they are also accident-prone groups. In order to ensure the safe operation of the simply supported girder bridge, it is necessary to monitor and control the deflection of the main girder, because once the main girder has too much deflection, it will affect the normal traffic of the bridge deck, and cause changes in the line type, and then change The distribution of internal forces can cause structural damage. Most of the existing technologies focus on the monitoring of the deflection of the main girder, such as the bridge structure deflection measurement system based on the wireless inclination angle, which uses the wireless inclination sensor and the corresponding data processing unit to obtain the deflection value. However, deflection monitoring alone is not enough. It is necessary to intervene and control the excessive deflection of the main girder timely and effectively to ensure the safety of the bridge. Therefore, it is necessary to continue to develop the main girder deflection control device for simply supported girder bridges.
发明内容Contents of the invention
本发明的目的在于克服现有技术中的不足，提供一种简便有效地简支梁桥的主梁挠度控制装置。The object of the present invention is to overcome the deficiencies in the prior art and provide a simple and effective main girder deflection control device for simply supported girder bridges.
一种简支梁桥的主梁挠度控制装置，包括与主梁平行设置的可压缩螺旋体，所述螺旋体的两端上部分别与支撑主梁的两个桥墩固定连接，下部为自由端；在主梁的跨中位置竖向设置有钢杆，所述钢杆连接在主梁和螺旋体之间；在两个桥墩的前后两侧分别固定有滑轮，所述钢杆上固定有绳索，所述绳索的另一端分别跨过滑轮后交叉固定在螺旋体的下部。A main girder deflection control device for a simply supported girder bridge, comprising a compressible helix arranged parallel to the main girder, the upper parts of the two ends of the helix are respectively fixedly connected with two piers supporting the main girder, and the lower part is a free end; A steel rod is vertically arranged at the mid-span of the beam, and the steel rod is connected between the main girder and the spiral body; pulleys are respectively fixed on the front and rear sides of the two piers, and a rope is fixed on the steel rod, and the rope The other end of the cross is fixed on the lower part of the helix after crossing the pulley respectively.
进一步地，如上所述的简支梁桥的主梁挠度控制装置，钢杆上固定有4条绳索，该4条绳索的另一端分别跨过滑轮后交叉固定在螺旋体的下部。Further, in the above-mentioned main girder deflection control device of a simply supported girder bridge, four ropes are fixed on the steel rod, and the other ends of the four ropes cross the pulleys respectively and are crossed and fixed at the lower part of the spiral body.
进一步地，如上所述的简支梁桥的主梁挠度控制装置，所述绳索为钢丝绳。Further, in the above-mentioned main girder deflection control device of a simply supported girder bridge, the ropes are steel wire ropes.
进一步地，如上所述的简支梁桥的主梁挠度控制装置，所述螺旋体为钢制螺旋体。Further, in the above-mentioned main girder deflection control device of a simply supported girder bridge, the spiral body is a steel spiral body.
本发明提供的简支梁桥的主梁挠度控制装置，结构简单、能有效地控制主梁挠度，而且在极端情况下能提供支撑和耗能作用，从而大大提升了主梁的安全系数，减少生命财产损失。The main girder deflection control device of a simply supported girder bridge provided by the present invention has a simple structure, can effectively control the main girder deflection, and can provide support and energy dissipation in extreme cases, thereby greatly improving the safety factor of the main girder and reducing Loss of life and property.
附图说明Description of drawings
图1为本发明简支梁桥的主梁挠度控制装置结构示意图；Fig. 1 is the structure schematic diagram of the girder deflection control device of simply supported girder bridge of the present invention;
图2为图1的俯视图。FIG. 2 is a top view of FIG. 1 .
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明中的附图，对本发明中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
图1为本发明简支梁桥的主梁挠度控制装置结构示意图；图2为图1的俯视图，如图1及图2所示，本发明提供的简支梁桥的主梁挠度控制装置包括与主梁1平行设置的可压缩钢制螺旋体2，所述钢制螺旋体2的两端上部分别与支撑主梁1的两个桥墩3固定连接，下部为自由端；在主梁1的跨中位置竖向设置有钢杆4，所述钢杆4连接在主梁1和螺旋体2之间；在两个桥墩3的前后两侧分别固定有滑轮5(图2所示)，所述钢杆4上固定有4条钢丝绳，该4条钢丝绳的另一端分别跨过滑轮5后交叉固定在钢制螺旋体2的下部。Fig. 1 is the structure diagram of the main girder deflection control device of simply supported girder bridge of the present invention; Fig. 2 is the top view of Fig. 1, as shown in Fig. 1 and Fig. 2, the main girder deflection control device of simply supported girder bridge provided by the present invention comprises A compressible steel spiral body 2 arranged parallel to the main beam 1, the upper parts of the two ends of the steel spiral body 2 are respectively fixedly connected with the two piers 3 supporting the main beam 1, and the lower part is a free end; in the span of the main beam 1 The position is vertically provided with a steel rod 4, and the steel rod 4 is connected between the main girder 1 and the spiral body 2; pulleys 5 (shown in Figure 2 ) are respectively fixed on the front and rear sides of the two piers 3, and the steel rod 4 4 is fixed with 4 steel wire ropes, and the other ends of these 4 steel wire ropes are crossed and fixed on the bottom of the steel spiral body 2 after crossing the pulley 5 respectively.
具体地，首先在主梁1的下部平行布置钢制螺旋体2，钢制螺旋体2没有紧密贴合在一起，可以被压缩，每端的上部分别固定在支撑主梁1的两个桥墩3上，在主梁1的跨中位置有竖向布置的钢杆4连接主梁1和钢制螺旋体2，在两个桥墩3上分别固定有两个滑轮5，钢杆4左侧的两根钢丝绳6通过左侧的滑轮5后分别固定在钢制螺旋体2右端下部的两侧，钢杆4右侧的两根钢丝绳7通过右侧的滑轮5后分别固定在钢制螺旋体2左端下部的两侧。Specifically, firstly, the steel spiral body 2 is arranged in parallel on the lower part of the main girder 1. The steel spiral body 2 is not tightly fitted together and can be compressed. The upper part of each end is respectively fixed on the two piers 3 supporting the main girder 1. At the mid-span position of the main girder 1, there is a vertically arranged steel rod 4 connecting the main girder 1 and the steel spiral body 2. Two pulleys 5 are respectively fixed on the two piers 3, and two steel wire ropes 6 on the left side of the steel rod 4 pass through. The pulley 5 on the left side is respectively fixed on the both sides of the steel spiral body 2 right-hand bottoms, and the two steel ropes 7 on the right side of the steel rod 4 are respectively fixed on the both sides of the steel spiral body 2 left-hand bottoms by the pulley 5 on the right side.
工作原理：当主梁1的跨中处有下挠时，固定在此处的钢杆4会随着下降，对左右两侧的钢丝绳6和7产生拉力，这种拉力通过滑轮5传到钢丝绳6和7的另一端，也就是钢制螺旋体2左右端部的下部位置，使螺旋体2的下部受压而发生压缩。当钢制螺旋体2的下部被压缩到极限时，就会阻止钢杆4的下降，进而使主梁1不再发生下挠。Working principle: When there is a downward deflection at the mid-span of the main girder 1, the steel rod 4 fixed here will descend accordingly, generating tension on the steel wire ropes 6 and 7 on the left and right sides, and this tension is transmitted to the steel wire rope 6 through the pulley 5 And the other end of 7, that is, the lower position of the left and right ends of the steel spiral body 2, makes the bottom of the spiral body 2 compressed and compressed. When the lower part of the steel spiral body 2 is compressed to the limit, it will prevent the steel rod 4 from descending, and then the main beam 1 will no longer be deflected downward.
本发明在强震作用等极端情况下，即使主梁发生断裂或坠落，同时钢丝绳受到的拉力使其断裂，这里布置的钢制螺旋体也能对主梁起到很好的支撑和耗能作用，避免造成主梁上通行的人或者车辆产生很大的损失。In extreme cases such as strong earthquakes, even if the main girder breaks or falls, and the tension on the steel wire rope causes it to break, the steel spiral body arranged here can also play a good role in supporting the main girder and dissipating energy. Avoid causing great losses to people or vehicles passing on the main girder.
本装置的结构简单、能有效地控制主梁挠度，而且在极端情况下能提供支撑和耗能作用，从而大大提升了主梁的安全系数，减少生命财产损失。The device has a simple structure, can effectively control the deflection of the main beam, and can provide support and energy dissipation in extreme cases, thereby greatly improving the safety factor of the main beam and reducing loss of life and property.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
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| CN108411797B (en) * | 2018-02-09 | 2020-07-31 | 广西交通科学研究院有限公司 | Method for controlling arch crown deflection in reinforcing construction of increasing section of catenary arch springing |
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